Tire construction.



vw. r-J.'-TR|GALET. TIRE lCONSTRUCTION.

AAPPLICATION F ||4. ED DEC. I7 1913.

, 1,140,778. Patented Ma'y25,1915.

2 SHEETS-SHEET l.

between the head 32 and shoulder 29. The tube is also provided with the customary valve 34 by means of .which it be inflated.

The pneumatic tube 23 is further thickened at its outer periphery to. provide a cir-l cumferential tread engaging shoulder having a transversely extended face and at eithervside to provide laterally directed circuniferential shoulders 36 for locking engagement with locking beads 37' formed upon the edges of the tread or shoe 24:. This that the interlocking shoulders and beads 36 and 37 of the tube and tread line within the outer edge portions of the springs and the springs thereby assist in preventing dis-A engagement of said parts.

In Fig. 2 of the drawings, a slightly 'Inodied form of construction which is practically identical with that previously described with the exceptionthat the interposed shield .39 is omitted and replaced by an outer shield tf1-formed of resilient metal and disposed about the outer periphery'of the tread 41.' This tread .1s

similar in construction to the tread 24:., but

is provided. at spaced intervals with sockets 4:2 formed in oppositeiy disposed pairs' and adapted to receive inwardly directed studs iformed upon theinner face of the shield e0. This construction provides a .metallic armor or tread plate for the tire, while the seating of the studs 43 in the sockets 42 of the tread4 prevents vany independent movement of creeping of the shield With respect to the tire. D

In applying my pneumatic tire, the tube 23 is .positioned upon the rim while de'-l fiated, the locking studs 3].' being preferably passed into the inner ends -of the bores of the rim and the studs 25 then passed outwardly through the rim and threaded into place. With the form of tire shown in Fig. 1, the shield 39-is then placed within the tread 24 and the latter positioned about the tire which in the meantime has been partially illed with air. The rings 15, together with their springs, are then fastened in placeupon either side of the tire, after which the tire is fully inflated. This infiation ofthe tire forces the same against the springs and insures a positive looking en- I have shown gagement between the shouiders 36 and.

beads 37 of the tube and shoe.' respectively. ln the. form oftire shcwn in Fig. 2, the

assembling is the same with the exception..

that the metallic shield body is positioned about the tread before the saine is appliedA to the partially inia'ted tube.

rihe above' described tire is practically blow-out proof, .as .blew-outs are generally due to excessive flexing ordistortion of the tire casing causing folds or cracks inthe fabric and consequent weak spots. The metallic shields employed in' connection With my tire prevent such flexing or distortion of the fabricand, cmisequently, prevent the .formationI `of folds therein and weakening of the tread.. The reinforcing springs protect the tire to a great extent from in]uryA from the side such as might be caused by stones 'or raised trolley tracks and the like and absolutely prevent displacement of the tire fromV the Wheel. The'tread of my tire protects the pneumatic tube from wear and tear, serves either to inclose the metallic shield or as an anchor for the shield and gives a .greater width of bearing surface for the wheel.

The metallic shield 39 is preferably made in the form of a split ring having beveled overlapping ends in order to permit longitudinai expansion on and .with the tube when inflating the same. To prevent binding between the tube and-this shield, the shield may be coated internally with some lubricating oii including graphite in its composition.

As shown'in Figs. l and 2, the plies of canvas which stiifen and reinforce the tread of the tire, vafter being brought together and doubled upon themselves to form the locking beads, have their free edge portions again separated to properly reinforce the shoulders of the tread. which engage against .the shoulders of thepneumatic tire or tube. Theperipheral edges of the tread are in.-

clined inwardly radially in such a manner' that the locking bead portions of the tire seat Within the spring or guard arms of the rim, While at the sanietime the peripheral outer face of the tread may be constructed much Wider than the diameter f the tire or pneumatic tube proper. Because of this the tire is vpeculiarly adapted for'use upon heavily built vehicies or vehicles carryin heavy loads. Furthermore, the eXtende edge portions ofthe tread protect the main body of the tread and greatly prolong the life' of the tire. As a matter of fact, the

tread portion is usually7 thickened exteriorly adjacent its peripherai edges, whereby its side faces extends tangentially toward the intermediate portions of the side faces of the tube. i

Although l have illustrated and described a pneumatic'tire construction in ail its details, it will, of course, be understood that l do not wish to limit myself to the specific details set forth, various minor chauves, within the scope of the appended claims, may be made 'it any time,'if desired, with out in the slightest degree departing from the spirit of my invention.

Having thus described the inventiongifhat claimed as new is:

l tire construction 'including a pneu.- inatic tube thickened to provide a tread portion having circumferential shoulders and to provide circumferential locking ribs spaced from the shoulders, and a separabletread provided at its free edges with in- .vardly directed circumferential. locking beads for engagement with the Alocking ribs of the tube and cut-away interiorly to provide shoulders engaging the shoulders of the tube, said tread being reinforced-by a plurality of fabric layers, the peripheral edges of which are extended into and aboutv the beads and then separated and extended i' in spaced rela-tion to additionally reinforce Copies o! this patent may be obtained for those portions of the tread between the beads and shoulders.v

A tire construction including a pneumatic tube thickened to provide a tread portion having circumferential shoulders and to provide circumferential locking ribsspaced from the shoulders, and a separable tread provided at its free edges With 1nvwardly directed circumferential locking WALTER D.l TRIGALET. [La] Witnesses:

ALBERT G. NURENBERG, WALTER H. SWIFT.

signature five cents each, by addressing the C'ommisli-o'nex*I o f'lPatentl. Washingtomlhc. 1 

